<template>
<el-container class="home_container">
    <el-header>
        <div>
            <img src="../assets/logo.png" alt="">
            <span>后台管理系统</span>
        </div>
        <el-button type="info" @click="logout">退出</el-button>
    </el-header>
    <el-container>
        <el-aside :width="isCollapse ? '64px':'200px' ">
          <div class="toggle-button" @click="toggleCollapse">|||</div>
                    <el-menu :default-active="activePath" class="el-menu-vertical-demo" background-color="#373d41" text-color="#fff"
                     active-text-color="#409EFF"  :collapse="isCollapse" :collapse-transition="false" router  >
                        <!--一级菜单-->
                        <el-submenu :index="item.id + ''" v-for="item in menulist" :key="item.id">
                            <template slot="title">
                                <i class="el-icon-location"></i>
                                <span>{{item.authName}}</span>
                            </template>
                            <!--二级菜单-->
                            <el-menu-item :index="'/' + subItem.path + ''" v-for="subItem in item.children" :key="subItem.id"
                            @click="saveNavState('/' + subItem.path + '')">
                              <template>
                                <i class="el-icon-menu"></i>
                                <span>{{subItem.authName}}</span>
                              </template>
                            </el-menu-item>
                        </el-submenu>
                    </el-menu>
        </el-aside>
        <el-main>
          <router-view></router-view>
        </el-main>
    </el-container>
</el-container>
</template>

<script>
export default {
  data: function () {
    return {
      menulist: [],
      isCollapse: false,
      activePath: window.sessionStorage.getItem('activePath')
    }
  },
  created () {
    this.getMenuList()
    this.activePath = window.sessionStorage.getItem('activePath')
  },
  methods: {
    logout () {
      window.sessionStorage.clear()
      this.$router.push('/login')
    },
    async getMenuList () {
      const {
        data: res
      } = await this.$http.get('menus')
      if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
      this.menulist = res.data
    },
    toggleCollapse () {
      this.isCollapse = !this.isCollapse
    },
    saveNavState (activePath) {
      window.sessionStorage.setItem('activePath', activePath)
      this.activePath = activePath
    }
  }
}
</script>

<style lang="less" scoped>
.el-header {
    background-color: #373d41;
    display: flex;
    justify-content: space-between;
    padding-left: 0;
    align-items: center;
    color: #fff;
    font-size: 20px;

    >div {
        display: flex;
        align-items: center;
    }

    span {
        margin-left: 15px;
    }
}

.el-aside {
    background-color: #333744;
    .el-menu{
      border-right:none
    }
}

.el-main {
    background-color: aliceblue
}

.home_container {
    height: 100%
}

.toggle-button{
  background-color: #808080;
  font-size:10px;
  line-height: 24px;
  color:#fff;
  text-align:center;
  letter-spacing: 0.2em;
  cursor: pointer;
}
</style>
